Improvement in safety-valves for boilers



UNITED STATES PATENT EEICE.

C. L. FRINK, OF ROGKVILLE, CONNGTIGT.

Specification forming part of Letters Patent No. 55,639. dated June 19,1866.

To all whom 'it may concern.-

Be it known that I, G. L. FRINK, of Rockville, in the county of Tollandand State of Connecticut, have invented a new and useful Improvement inSafety-Valves 5 and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure l represents a sectional side elevation of this invention. Fig. 2is a transverse section ot' the lever, showing its connection with thevalve-stem.

Similar letters oi" reference indicate corresponding parts.

This invention consists in the arrangement of' a swinging supporter, incombination with the stem and lever ot' a safety-valve, in such a mannerthat said supporter will accommodate itself' to the position of thelever and the lateral strain 011 the valve-stem will be diminished oravoided.

It consists, further, in making the standard which supports the fulcrumof the lever of a safety-valve adjustable in such a manner that thesame'can be readily accommodated to the length ofthe valve-stem and thelever can be easily brought in a horizontal position.

It consists, tnally, in the arrangement of a central screw andcla1npingplate,in combination with the valve and valve-stein, in such amanner that the face ofthe said valve can be readily packed, and thepacking can be renewed Whenever it should become desirable.

A represents the box or shell of my safety- Valve B, said valve beingsecured to the bottom end of a stem, C, and made to close down upon aseat, a.

To the top of the stem C is attached a hinged support, as D, which iscomposed of two crossbars, b b', and two straps, c. The top crossbar, b,is firmly secured to the valve-stem, but the lower cross-bar, b', titsloosely on the same and rests in the supporting-straps c, which aresuspended from the endsA of the top cross-bar, as clearly shown in thedrawings.

The lever E, which is loaded with a Weight, F, is split so that itstraddles the top end of the valve-stem and rests upon the lowestcrossfbar, b', of the supporter D. This cross-bar has a swinging motionin the direction ot' the lever, and if the valve rises, or if the levershould not be in perfectly horizontal position, said supporteraccommodates itself to the position ofthe lever, and the lateral strainon the valvestem is diminished or avoided.

The lever E has its fulcrum in a standard, G, which rises from the topplate oi' the boiler. This standard I have made adjustable by ascrew-thread, so that it can be easily lengthened or shortened, and thatthe lever E can be brought in a horizontal position.

In practice I, propose to make this standard out of two parts, whichwill be connected by a left and right hand thread, so that the lengththereof can be adjusted with ease and convenience, and without removingthe fulcrum-pin ot` the lever.

The face of the valve is packed by means of a piece, d, of india-rubberor other suitable material, which is held in place by a plate, e, andscrewf. By removing this screw thepacking can be readily taken out andrenewed whenever it shall become necessary.

What I claim as new, and desire to secure by Letters Patent, is

l. The hinged supporter D, in combination with the valve-stem C andlever F of a safety valvesubsta1'1tially as and for the purposedescribed.

2. The central screw, f, and clam ping-plate e, in combination withthgbpackingpiece cl and valve B, constructed and operating substantialas and for the purpose described.

G. L. FRINK.

Witnesses:

R. L. FREIN,

E. I. SMITH.

